Roasting-furnace.



PATENTES) MAR. 6, 1906,

P. KLEPBTKO.

RASTING FRNE.

APPLIUATION FILED Hv. a, was.

2 SHEETBSHBET l1 .Mm f Y F4 PATBNTED MAR. 6, 1906.

F. KLEPBTXU.

ROASTING PURNAGE.

APPLEOATIH Hun Nov. e, 1905.

E SHEETS-SHEET 2 A -Hill mi m SSW. ...i u

alibi-m FRANK KLEPETKO. OF NEW YORK, N. Y.

ROASTING-FUFINACE.

Specification of Letters Patent.

Patented March 6, 1906.

Application filed November 6, 1905. Serial No. 286,042.

To aZZ'whmn it may con/cern.-

Be it known that I, FRANK KLEPETKO, a citizen of the United Statesyresiding at New York, in the county of New York and State of New York, have invented certain new and useful lm rovements in Roasting-Furnaces, of which t ie following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part hereof.

My invention has relation to improvements in roasting-furnaces; and it consists in the novel construction and arrangement of parts more fully set forth in the specification and pointed out in the claims.

In the drawings, Figure 1 is a vertical central section of a conventional McDougall oreroasting furnace, partly broken, showing a corresponding section of one of the Jforms of m r improvement applied thereto. Fig. 2 is a iorizontal section on line 2 .2 of Fig. 1. Fig. 3 is a middle vertical section of the rabble` shaft, showing a modified form of circulation therefor. Fig. 4 is a similar section of the rabble-shaft with a second modification of circulation therefor. Fig. 5 is a similar section of the rabble-shaft, showing a third modiiication of a circulating system. Fi 6 is a cross-section of a hollow shaft divided into three longitudinal conduits. Fig. 7 is a cross-section of a shaft having four longitudinal conduits. l Fig. 8 is a vertical sectional detail showing aconstructon capable of feeding independent liquids to the, conduits of the rabble-shaft, and Fig. Q is a diagrammatic view of a combination of the constructions shown in Figs. 1 and 5 as applied to a single shaft.

he present invention is a qualification of the construction of the cooling apparatus shown and described in my pending application for Letters Patent for improvements in roastin furnaces, Serial No. 223,539, filed Septem er 6, 1904, the Special object of the resent im rovement being to provide the ollow rah le-shal't with longitudinal division-walls or diaphragme dividing the passage of the shaft into two or more independent conduits for the circulation of independent currents of cooling medium, so that in the event of a leak or puncture of the walls of one of the conduits the remaining conduits may notbe aected, thus ohviating the necessity of an immediate shut-down of the furnace. The diaphragms referred to also permit of the introduction of cooling mediums from independent sources, so that water may be made to circulate through one or more of the conduits and air through the balance, or streams of water of diiferent densities or specific vravities, and consequently of different spec' c heats, may he utilized.

The advantages of the present construction wiil be better apparent from a detailed description of the invention, which is as follows:

Referring for the presentto Figs. 1 and 2 of the drawings, F re resents the furnace, and h the several heart s in which the material is treated, the said material dropping from thc upper hearth successively through the several hearths until it is delivered into the delivery-hopper, (not shown,) the hearths being provided, respectively, with the centrai and marginal openings 1 i?. for the passage of the material. Passing through the hearths is the rotatable hollow rabble-shaft 3, from which radiate the series of hollow rabble-arms 4, extending into the several hearths and carrying rakes, (not shown,) all as fully understood in the art, the features described forming no part of my present invention.

Referring again to Figs. 1 and 2 of the drawings, 5 represents a longitudinal divi- `sion-wall,diaphra m,orweb dividin the passage-way of the s aft into indepen ent conduits or sections, the latter being provided at the lower end with outlet taps or nozzles 6 6, which discharge into the annular trough 7, encompassing the base of the shaft. These independent conduits or divisions of the shaft are supplied with a cooling medium (water) through the branches 8 8, leading to a coupling 9, whose stem revolves in a stuifing-box 10, mounted on top of the furnace, the water being furnished om a stationary supply-pipe 11, leading to any source of sulpply. (Not shown.) The water entering t ie respective divisions or conduits of the shaft circulates throu h said conduits and is eventually discharge through the nozzles 6, as shown by the arrows in Fig. 1. The respective conduits of the hollow shaft are in the present instance each divided into a series of compartments or chambers a b c d ef g (and so on, dependin on the number of hearths, the present sha t and furnace being broken, so as to omit compartment d) by means of the transversely-disposed division-walls or partitions 12, occupying a plane slightly IOS above-thc bottoms of the adjacent rabble- Fig. 5 the circulation is the same as that of arms 4, each chamber having leading therefrom the distributing conduits or pipes 13, which extend into the hollow arms and dischargl. thereinto. The presence of the several partitions 12 constrains the currents on either side of the wall 5 to pass first through the arms 4 outwardly, thence through the distributing-pipes 1.3 inwardly into the compartments from which said distributingipes lead, the current flowing successive y fiom one compartment (g,f, e, and so on) to the next com artlnent below it through the particular holIow arm and distributing-pipe, establishing communication between the two consecutive compartments until the last disc arged into the trough 7. Instead of discharging the water at the bottom of the shaft I may dischar e it at the top of the shaft, withdrawing t e water from the bottom compartments a a by means of dischargepipes 6 6', as shown in Fig. 3. These pipes 6 6 extend the full length of the shaft through the several partitions each conduit on opposite sides of the wall 5, the up er ends of the pipes 6 6 being passed throug the shaft-wal and dischar lng into a trough 7, encircling the top of tIie shaft. In other respects the circulation of the two independent,water-currents is the same in Fig. 3 as in Fig. 1, as fully indicated by"the4 arrows in Fig. 3. In the event it is desirable to shut off the supply to either conduit or division of the sha t under circumstances reviously referred to or in the event of acci ent of any kind the same may be done by closing the valves 14, with which the feed-pipes or branches 8 are provided.

In the forms of my invention above described the water (or equivalent cooling medium) is discharged into the top of the rabble-shaft circulating downward; but I may introduce the water into the bottom of the shaft, whence it circulates upward through the several shaft-com artments, arms, and distributing-pipes, fina ly escaping at the top of the shaft, as fully shown in the modificationsshown in Figs. 4 and 5. In Fig. 4 the feed-pipes 8 (corres onding to the branches 8 extended) extend friom the top of the shaft down into the bottom compartments ay a, whence the water circulates upward through the distributing-pipes 13 into the first set of arms, thence inward into the next conti uous compartments b b, and so on, till fina ly discharged through the nozzles or taps 15 into the trough 16. In Fig. 5 the supplyipe 11 supplies the water to the branches 8,

eading from the hollow base 17 of the shaft,l

the bevel-gear 18 of the shaft-driving mec anism, (not herein shown,) the said branches terminating in the bottom compartments a a and discharging directly thereinto. In the modification shown in said base carrying comlpartment is reached,when the water is 12, one pipe iny Fig. 4, the water flowing out of the top of the shaftthrough the taps 15 into the trough 16.

In all of the foregoing cases the water has been shown as circulating throu h the shaft from one end to the opposite enf? in the conduits or subdivisions formed by the wall 5 but it is apparent that the presence of the wall 5 makes it possible to combine in one structure the forms shown in Figs. 1 and 5, and if in such a combined structure the valve 14 of one branch 8 leading to the top of one conduit be opened and the valve 14 of the adjacent branch leading to the top of the adjacent conduit be closed and at the same time the valve 14 of one branch 8 leading to the bottom of first conduit be closed and the valve 14 of the adjacent branch 8 leadin to the bottom of the second or adjacent con uit be opened (both ends of the shaft being provided with outlet-taps and troughs) it 1s apparent that it would be possible to direct and circulate a current through one conduit downward and through the other conduit u ward, or vice versa, depending on which va ves 14 were manipulated to effect such a result. We should then have two currents circulating in opaosite directions through the shaft, the one in ependent of the other. This possibility growing out of the present construction is important, since we can thus introduce cold water at both ends of the shaft, each independent current cooling its own conduit or shaftsubdivision, Fig. 9.

Preferably one rabble-arm 4 extends from each conduit or shaft-subdivision into its corresponding hearth, and while in the main illustrations only one web or Wall 5 is shown dividing the shaft into two independent noncommunicating conduits the shaft ma be subdivided into anynumber of such condbiiits In Fig. 6 is shown a cross-section of a shaft 3 having three webs 5 meeting at the center, dividing the original passage-Way of the shaft into three conduits, each rovided with a feedpipe p, and in Fig. 7 is slfown a cross-section of a shaft 3 having two webs 5 intersecting each other at right an les and forming four conduits, also provide with feedipes p, in both cases the walls f the shaft eing provided o posite each conduit with stub-arms 4, to wllch the rabble-arms are generally secured.

Should it be desirable to introduce different liquids into the respective conduits of the shaft or liquids having different specific heats, this can be accomplished in some such Wa` as illustrated in Flg. 8, in which the shaft 1s surmounted by a vessel 19, having an inner cylindrical compartment 19 and an outer annular compartment 19, the bottoms of which discharge into the respective conduits of the shaft, the compartment 19 being supplied with liquid from pipe 20 and the cornpartment 19 from pipe 21.

IIO

Considering the. shaft as a unit or entirety, the water circulates vertically through it and through the hollow arms vertically in series and radially through the arms in series, and considering each conduit independently (and in view of the fact that only one arm extends from each conduit into its corresponding heart-h) the circulation through each conduit and arms would be vertically and radially in series. In both cases, however, the circulating medium enters the shalt at one end, being abstracted therefrom at the opposite end, The points of inlet and final outlet may be at the same end, shown in Fig. 3; but even in this caso the point at which the li( uid is abstracted or conducted out of thc sl tft is at thc opposite end from the inlet.

Obviously the cooling apparatus here described is not necessarily restricted in its application to furnaces, but maybe used in any art Where available.

Having described my invention, what I claim isW l. ln a rabble apparatus a hollow rabbleshaft having its passage-way divided into a series of conduits, and moans for independently supplying each conduit with a suitable cooling medium substantially as set forth,

2. ln a rahhle apparatus, a hollow rabbleshaft having its passage-way divided into a. series of contiguous non-communicating conduits, substantially as set forth.

3. In a rabble apparatus, a hollow rabbleshaft having its passage-way divided into a series of contiguous, independent conduits, and means for circulating a cooling medium through said conduits, substantially as set forth.

4. In a rabble apparatus, a hollow rotatable rabble-shaft` having its passage-way divided into a series of contiguous, independent conduits, and means for circulatingacooling medium through said conduits, substantially as set forth.

In a rabble apparatus, a hollow rabbleshaft having its passage-way divided into a series of contiguous, independent conduits, and means for circulating independent cooling media through the several conduits, substantially as set forth.

6. In a rabble apparatus, a hollow rotatable rabble-shaft having its passage-way divided into a series of contiguous, independent conduits, and means for circulating independent cooling media through the several conduits, substantially as set forth.

T. in a rabble apparatus, a hollow rabbleshaft having its passage-way divided into a series of contiguous, independent conduits, means for circulating a. cooling 'medium through the several coni'luits, and means for cutting oil the flow of the circulating medium toany conduit, substantially as set forth.

S. In a rabble apparatus, a hollow rabblei shaft having its passage-way divided into a series of contiguous, independent conduits, and means for circulating cooling media through thc several conduits simultaneously in different directions, substantially as set forth.

9. Vin a rabble apparatus, a hollow rabbleshaft having its passage-way divided into a series of contiguous, independent conduits, hollow rabble-arms com municating with said conduits, and means for circulation through the shaft and arms vertically in series, and through the arms radially in series, substantially as forth.

1i). In a rabble apparatus, a hollow rabblei shaft having its passage-way divided into a series of contiguous independent conduits, hollow rabble-arms communicating with said conduits, means for circulation through the shaft and arms vertically in series, and through the arms radially in series, 'means for introducing the cooling medium into any conduit at one end, and abstracting it from the saine conduit at the opposite end, substantially as set forth.

1 l in a rabble apparatus, a hollow rabbleshaft having its passage-way divided into a series of contiguous independent conduits, hollow rabble-arms communicating with said conduits, and incans for circulatifni through each conduit and arms thereof vertically and radially in series, substantially as set forth.

12. In a rabble apparatus, a hollow rabbleshaft having its passage-way divided into a serios of contiguous independent conduits, hollow rabble-arms leading from said conduits, means for circulation through each conduit and arms thereof vertically and radially in series and through the arms radially in series, substantially as set. forth.

i3. In a rabble apparatus, a hollow rabbleshaft having its passage-way divided into a series of contiguous, independent conduits, hollow arms leading from said conduits, means for circulation through the shaft and arms vertically in series, and through the arms radially in series, means for discharging the circulating medium into any of the conduits at one end thereof, and means for conducting the circulating niediuin out of the said conduits from the opposite end, substantially as set forth.

'l-fl. In a furnace having a pluralityY of hearths, a. rotatable hollow shaft passing through the hearths and having its passageway divided into a series of individual conduits, a series of hollow arms leading from said conduits into the several hcarths, a series of chambers distributed throughout each conduit and communicating with the hollow arms, and means for feeding a cooling medium into the several conduits of the shaft and circula-ting the same through the shaft and arms, substantially as set forth.

i5. In a furnace having a plurality of hvarths, a rotatahlv hollow shaft passing through thv hvarths and having its passagvwa)v dividvd into a svrivs ol individual vonduits, a svrivs ol' hollow arms loading l'roin thv vonduits into thv svvvral hvarths, a svrivs ol' vhambvrs distrihutvd throughout vavh vonduit and vomnnlnivating with tho hollow arms, and mvans lor inirodnving a vooling mvdium into onv vnd ol' any ronduit and virvulating thv salmJ through thv svvvral chamhvrs ol'isaid vonduit and thv hollow arms lvading thvrvfl'om, snhstantialllv as svt l'orth.

16. ln a furnavv having a plurality of hoarths, a rotatahlv hollow shaft passing through thv hvarths and having its passagvwav dividvd into a svrivs of individual vonduils, a svrivs ol` hollow arms radiating from said vonduits and vxtvnding into thv svvvral hvarths, a svrivs of vhamhvrs svparatvd hy transvvrsv partitions distrihutvd throughout vavh vonduit. llistrihuting-pipvs lvading lrom thv rvspvvtivv vhanihvrs and opvning into thv adjavvnt arms, and a [vvd-pipe adaptvd to discharge a Cooling medium into a vhanlhvr of vavh conduit, suhstantiall)r as svt l'orth.

1T. ln a rabblv apparatus, a hollow shal't having a svrivs of longitudinal vonduits, and transvvrsv partitions dividing thv vonduits into Contiguous vhamhvrs or vonipartnivnts, suhstantially as svt forth.

lo. In a rahhlv apparatus, a hollow shaft having a svrivs of longitudinal vonduits, transvvrse partitions dividing tho vonduits into contiguous vhanihvrs, and invans for virvulating a vooling mvdium through thv vhamhvrs in vithvr dirvvtion, suhstantiall)v as svt lorth.

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